Slight variation of the Machu Picchu route. West at Yanama and north to Huancacalle were there are the ruins of Vitcos. Then onto San Francisco de Vilcabamba (or New Vilcabamba) for good measure. Returning to Huancacalle the next day and then hiking to Lucma for transport back to Cusco. This route is actually shown in this picture- http://www.summitpost.org/cachora-choquequirao-machu-picchu-map/469484

Did this as a 3 day backpack with an Israeli that I met along the route. Fairly big distance (33km one way) and over 3000m/10,000' of total elevation gain. Ruins are way at the top of the ridge. Fairly decent if you haven't seen a lot already.

We hiked it on our own, without using mules or horses, had a great time even though it rained every night. The days ranged from cloudy to hot and sunny. Lots of steep climbs and descents, few tourists compared to other routes.